#include <iostream>
#include <string>

double f(double x1,double x2,char ch)
{
	switch(ch)
	{
		case '+':
			return x1+x2;
		case '-':
			return x1-x2;
		case '*':
			return x1*x2;
		case '/':
			return x1/x2;
	}
}

int main()
{
	std::cout << "nermuceq araji tiv@: ";
	double x1=0;
	std::cin >> x1;
	std::cout << "nermuceq erkrord tiv@: ";
	double x2=0;
	std::cin >> x2;
	std::cout << "nrmuceq simvol@: ";
	char ch;
	std::cin >> ch;
	std::cout << x1  << " " << ch << " " << x2 << " = " << f(x1,x2,ch) << "\n";
	return 0;
}